MESON Chess Problem Database

Problem Display
PID: 200326 (8/1nrp2NK/1R1p1Qp1/r3b3/p2k2N1/BR1Ppp1b/BP6/8 w - - 0 1)

Wirtanen, Erkki Aukusti

5th HM., Suomen Shakki, 1957

8/1nrp2NK/1R1p1Qp1/r3b3/p2k2N1/BR1Ppp1b/BP6/8

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Rxd6#
    • 1...d5
      • 2.Qxe5#
  • Tries
    • 1.Sf5+?
      • 1...Kd5
        • 2.Sgxe3#
        • 2.R3b5#
        • 2.Qf7#
      • 1...gxf5!
    • 1.Se6+?
      • 1...Kd5
        • 2.Sxe3#
        • 2.R3b5#
      • 1...dxe6+!
    • 1.Rxd6+?
      • 1...Rd5
        • 2.Qxe5#
      • 1...Sxd6!
    • 1.Qxf3?
      • threat
        • 2.Qe4#
      • 1...Sc5
        • 2.R6b4#
      • 1...d5
        • 2.Qxe3#
      • 1...Bg2!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Sxe3#
        • 2.R3b5#
        • 2.Qe4#
      • 1...Bxf4!
    • 1.Qf5?
      • threat
        • 2.Qe4#
      • 1...Kd5
        • 2.Qe4#
      • 1...Sc5
        • 2.R3b4#
      • 1...d5
        • 2.Qxe5#
      • 1...gxf5!
  • Keys
    • 1.Qxg6!
      • threat
        • 2.Qe4#
      • 1...Kd5
        • 2.Qe4#
      • 1...Sc5
        • 2.R3b4#
      • 1...d5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(j);N_GUARD,S_CUTR(f)::R(G),XP(h)
    • P(h);N_GUARD,S_CUTR(f)::QAB1(H),XB(g)
  • Tries
    • Try
      • S(I);CHECK
      • Refutation
        • P(i);XS(I)
    • Try
      • S(I);CHECK
      • Refutation
        • P(l);CHECK,XS(I)
    • Try
      • R(G);CHECK,XP(h)
      • Vars
        • R(f);P_SPINR(f)::QAB1(H),XB(g)
      • Refutation
        • S(j);XR(G)
    • Try
      • Q(H);N_PINB(g),XP(b)
      • Threat
        • QAR1(H)
      • Vars
        • S(j);SBLOCK,S_CUTR(k)::R(G)
        • P(h);SBLOCK::QAB1(H),XP(a)
      • Refutation
        • B(c);
    • Try
      • Q(H);CHECK,N_PINB(g)
      • Refutation
        • B(g);XQ(H)
    • Try
      • Q(H);N_PINB(g)
      • Threat
        • QAR1(H)
      • Vars
        • K(e);P-FLIGHT,P_SPINB(g)::QAB1(H)
        • S(j);SBLOCK,S_CUTR(k)::R(D)
        • P(h);N_GUARD,S_CUTR(f)::QAB1(H),XB(g)
      • Refutation
        • P(i);XQ(H)
  • Actual
    • Q(H);N_PINB(g),XP(i)
    • Threat
      • QAR1(H)
    • Vars
      • K(e);P-FLIGHT::QAB1(H)
      • S(j);SBLOCK,S_CUTR(k)::R(D)
      • P(h);SBLOCK::S(I)
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